Cylinder blow-off for locomotives



(NoModeL) E. LONGSTRETH.

Cylinder Blow-Offs for Locomotives.

No. 232,046. Patented Sept. 7, 1880.

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UNITED STATES PATENT OFFICE.

EDWARD LONGSTRETH, OF PHILADELPHIA, PENNSYLVANIA.

CYLINDER BLOW-OFF FOR LOCOMOTIVES.

SPECIFICATION forming part of Letters Patent No. 232,046, dated September '7, 1880.

(No model.)

To all whom it may concern:

Be it known that I, EDWARD LONGSTRETH, a citizen of the United States, residing in Philadelphia, Pennsylvania, haveinvented an Improvement in Cylinder Blow-Offs for Locomotives, of which the following is a specification.

The object of my invention is to preventthe noise which aceompan ies the discharge of steam to and water of condensation from the cylinders I 5 plained hereinafter.

,[n the accompanying drawings, Figure 1 is a front view. partly in section, of a portion of the smoke-box end of a locomotive, showing my improvement; Fig. 2, a section on theline 2o 1 2, looking in the direction of the arrow;

Fig. 3, an inverted plan view, drawn to a reduced scale.

A represents one of the cylinders of a locomotive, and G the exhaust chest communicating with the exhaust-ports of the said cylinder, and with the usual nozzle through which the exhaust-steam is discharged into the chimney.

It has not been deemed necessary to illustrate or describe the character of the steam and ex haust ports and passages and nozzle, as these maybe of any style adopted in locomotiveengines.

A central three-way cock, X, communicates,

3 5 through pipes on m, with the opposite ends of each cylinder, this cock being under the control of the engineer, so that when the water of condensation has to be discharged from the cylinder he can open the cock, thereby permitting the water and steam to be forced first from one end and then from the other end of the cylinder as the piston reciprocates. This is a common arrangementin locomotives but it has been usual to permit the water and steam 5 to escape into the atmosphere, the result of which is the wellknown sharp intermittent and disagreeable noise, which, together with the jets of steam emitted, tends to frighten horses, and is more or less of a nuisance generally, especially when the locomotive is passing through towns, cities, and suburbs.-

In order to obviate this evil I extend a pipe, n, from a branch of the cock X to the exhaustchamber G, or to the exhaust-passage comm unicating with the said chamber, so that no noise will accompany the discharge of the steam from the cylinder.

It will be understood that the cock may be an ordinary three-way cock, the construction of which is too well known to need description.

I11 somelocoiuotives each cylinder has a discharge-cock at each end, in which case there will be two pipes, 12, communicating with the exhaust-chamber or exhaust passages, one pipe for each cock.

It will be advisable to make a small hole,,w, in the bottom of the exhaust-chamber, so that water of condensation may escape therefrom, and there may be a larger opening, through which any accumulation of mud or sediment may be removed from the exhaustchamber from time to time, this latter opening being provided with a detachable cover.

The invention may be used on locomotives in which compressed air or gas under pressure is employed in place of steam.

I claim as my invention- I In a locomoth-e-engine, the discharge or blow-0ft" cock 0r cocks of the cylinder and the exhaust chamber or passages communicating with the usual exhaust-nozzle, in combination with a pipe or pipes through which the waste steam may, on operating the cook or cocks, be discharged into the said exhaust-chamber and may then expand prior to passing into the chimney, all substantially as set forth.

In testimony whereofI have signed my name to this specification in the presence of two Subscribing witnesses.

EDWARD LONGSTRETH.

Witnesses:

JAMES F. TOBIN, HARRY SMITH. 

